525.2 Calibration Standard

Low level Nitrogen Calibration Units: 1x1mL ampoules or 10mL screwcapped bottle Nitrogen introduced using Aniline Catalogue No. Concentration Matrix: isooctane mg/kg (ppm) S-4142-0 Blank S-4142-05 0.5 S-4142-1

Octachlorostyrene, 1000µg/ml in MeChl, 1ml

2,2',3,4',5,6,6'-Heptachlorobiphenyl (188)